TANTALUM CAPACITIVE MICROELECTRODE ARRAY FOR A NEURAL PROSTHESIS

机译：神经假体的钽电容微电极阵列

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Tantalum capacitive microelectrode arrays made of new higher density powders are characterized with cyclic voltammetry, electrochemical impedance spectroscopy and pulse stimulation. The Ta surface is anodized to form a layer of Tantalum Pentoxide (Ta_2O_5). The methods to determine double layer capacitance (C_(dl)) of Ta_2O_5 are discussed. The frequency dependence of C_(dl) is determined. The injectable charge density of Ta_2O_5 is smaller than those of Faradaic electrodes. However, its good surface layer stability and capacitive charge injection mechanism are advantages for chronic stimulation applications.

机译：用循环伏安法，电化学阻抗谱和脉冲刺激对由新型高密度粉末制成的钽电容性微电极阵列进行表征。 Ta表面被阳极氧化以形成五氧化钽（Ta_2O_5）层。讨论了确定Ta_2O_5的双层电容（C_（dl））的方法。确定C_（dl）的频率依赖性。 Ta_2O_5的可注入电荷密度小于法拉第电极。然而，其良好的表面层稳定性和电容性电荷注入机制是慢性刺激应用的优势。

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《International Symposium on Chemical and Biological Sensors and Analytical Methods II, 2001》|2001年|p.622-629|共8页
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D.M. Zhou; R.J.Greenberg;
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Second Sight, LLC 28460 Avenue Stanford, Valencia, CA 91355;

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正文语种 eng
中图分类自动化技术、计算机技术;
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TANTALUM CAPACITIVE MICROELECTRODE ARRAY FOR A NEURAL PROSTHESIS

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